[Vor. 7 
208 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
On dead limbs of a frondose species. Jamaica. December 
to January. 
S. magnisporum may be recognized by its small, whitish 
fructifications, with narrowly reflexed or free margin, pale hy- 
menium distinetly setulose with the large cystidia, and by the 
very large spores. The large spores and basidia show relation 
of S. magnisporum to Aleurodiscus, but the absence of granular 
matter or of any unusual character of the paraphyses leads to 
the belief that this species will usually be sought for among the 
Stereums. 
Specimens examined: 
Jamaica: Chester Vale, W. A. & E. L. Murrill, 328, type, comm. 
by N. Y. Bot. Gard. Herb.; Cinchona, W. A. & E. L. 
Murrill, 522, comm. by N. Y. Bot. Gard. Herb. 
66. S. spumeum Burt, n. sp. Plate 6, fig. 66. 
Corticium spumeum Berk. & Rav. in Curtis Herb. (in part); 
Grevillea 20: 13. 1891 (in part—nomen).—C. ochroleucum, “as 
resupinate ambient condition,” Berk. € Curtis, Grevillea 1: 
166. 1873, but not Stereum ochroleucum Fries.—Not Corticium 
ochroleucum var. erimosum Berk. € Curtis, Grevillea 1: 166. 
1873. 
Type: in Burt Herb. 
Fruetifieations spongy-soft, effused, resupinate, separable, 
sometimes narrowly reflexed, the upper surface tomentose and 
becoming cartridge-buff to pinkish buff in the herbarium, the 
margin entire; in structure 400-1500 u thick, composed of 
loosely interwoven, hyaline, thick-walled hyphae 3-4 » in di- 
ameter, sometimes nodose-septate, the intermediate layer not 
bordered on its upper side by a crust-like or colored zone; 
hymenium even, cream-buff to pinkish buff; no conducting 
organs; cystidia incrusted, 36-60 X 9-12 u, sometimes protrud- 
ing up to 40 y; spores hyaline, even, 5-9 X3-4 u. 
Resupinate over areas 1-10X1-5 em., reflexed portion 1-4 
mm. broad when present. 
On bark and wood of dead beech, oak, and other frondose 
limbs. New York to Mexico. August to January. Rare. 
S. spumeum is noteworthy by its narrowly reflexed pileus, 
spongy-soft throughout, and without differentiation of its sur- 
